Warner Bros. Studio Tour London provides an amazing opportunity to explore the magic of the Harry Potter™ films. It is the most successful film series of all time. All Potter fans can see all the hard work from behind the scenes. This tour covers 2.5-hour Harry Potter walking tour in London. The prices – £21 for a child aged 5-15, £28 for an adult, £83 for a family of four are comparable to the likes of Alton Towers theme park.